CBS announced the retirement on Wednesday. He is the NFL’s longest tenured announcer, starting off as a color analyst for KMOX Radio coverage of St. Louis Cardinals games and other NFL games for the CBS Radio Network. He also broadcast Monday Night Football games for a dozen years before returning to CBS Sports in 1999.

“I’ve just never done anything else in the fall other than be in an NFL stadium,” the Hall-of-Famer who played his college ball at Michigan told the Associated Press. He said he’s only attended five Michigan games since he left the Ann Arbor campus, and he plans to take the time now “to go tailgate with some of my buddies.”

Dierdorf told the AP he remains mentally sharp, but his knees are shot. He said he considered retiring last season, and he added he may continue to broadcast games in St. Louis (where he lives) or on radio if it doesn’t require much travel.

Dierdorf was inducted into the Pro Football Hall of Fame in 1996. He joined Frank Gifford, John Madden, and Len Dawson as the only Hall of Fame Players who also have been bestowed with the hall’s Pete Rozelle Radio-Television Award.

“For 43 NFL seasons Dan Dierdorf has been a consummate professional both on the field and in the broadcast booth,” CBS Sports chairman Sean McManus told SI.com. “Very few people in any profession can boast a Hall of Fame playing career and a Hall of Fame broadcasting career.”

Dan Dierdorf is calling it quits after three decades of broadcasting NFL games. Dierdorf, 64, headed to the broadcast booth after playing on the offensive line with the St. Louis Cardinals for 13 years, six of which he was named an All-Pro.